Valve silencer



. dent of the cit Patented Feb. 2e, 19423.

' UNITED 'STATES i.lx'llaNTI oFFlcE..

MANUEL I. @maar Tacoma, WASHINGTON.

vALvE sIIfNcER.

Application mea neeemlie V2c, 192,0. serial 1516.432908'.

To all whom t may concern:

Be it known that I, EMMANUEL I. ADAMS,

rule, are incidental to the valve operation.

More specifically stated, it is the object of the invention to rovide valve silencers that are applicable a ike to the valve stems or rods of engines of the L or T head type and which comprise non-metallic impact members, to be disposed between the valve stems or rods and their tappets and coiled springs whereby the said members are held functionally in place, and looseness, caused by wear of the operating parts, taken up to Veliminate all noise of operation.`

In accomplishing this object I have provided the improved details of. construction, the preferred forms of which are illustrated in the accompanying drawings, wherein- Figure 1 is a detail viw showing a valve vactuating stem equipped with asilencer constructed and applied according to the present invention.

Figure 2 is a similarl view showing the device applied to the valve push rod in an engine of a type differing from that shown inFigure 1.

Figure 3 is a perspective view ofthe parts of the valve s1 encer removed from functional position.

Figure 4 is an enlarged-sectional view of the silencer pad.

AReferring more in detail to the draw- 1n he valve silencer, in its preferred formv consists of aV small, round fibre pad, or washer 1 that is fixedly mounted at the smaller end of a'conically tapered, spirally coiled spring 2, together with a spring seat, consisting. ofa disk 3 provided centrally with an aperture 4 and peripherally with' a ange 5 Within which the larger end of the spring is adapted to be supported i'n ,but .in an inverted 'the first position. y

' functional position. The pad 1 is rovided on its under side with a' 'concentric extension 6 wherein an annular groove 6 is formed, and the smaller end of the spring 1s wound tightly in this groove tofsecure' the pad thereto... i

In .Figures 1 and 2 of the drawings, 7

designates a part'of an engine heady provided with avalve seat 8 to which a vvalve 9 `mounted at the end of a valve stem 10 is fitted. In Figure l, 11 designates a valve tappet, 12 a cam shaft equipped with a cam 13 operable by connection with the engine crank shaft, not shown, to raise the tappetto actuate the valve, which is normally held' in closed position by means of a' spring 14 coiled 'about the stem and seatedat its opposite ends against the engine -wall 15 and in a spring seat 16 that isheld on the stem by a pin 17 projected through the same. s

In using the silencer with a valve mechaapplied to the lower end of the valve stem 10 with the end ofthe stem' extending through the aperture 4 and the plate,-infang inverted manner-seated against the spring seat 16. The larger end of the spring 2 is then seated within the plate flange with the padl disposed betwee'nthe end of the valve tion, wherein the valve stem 10 is engaged at its upper end ,by'one end of a,\roc lever 20 mounted centrally on a pin 21 and 4operatively connected at its opposite end with the upper'end of a push rod 21 which is engaged at its-lowerend by the cam 13.

In applying the silencer to this latter type of construction, it 'is disposed between the spring seat 16'and the end 20 of the'lever 2Q,in the same manner as before described,

With. the vdevice so constructed and applied, it is apparent that the pad will serve as a silencing buffer and will be held tightly against the tappet or rocker lever head by means of the spring 2 and in this Way all looseness', or play, that cornes from wear on the operating parts will be taken up and position with respect to 75 I nism of theabove character, the plate 3 'is prising a compression spring disposed between the ends o the stem and tappet to urge these parts apart and a pad carried by the spring to be engaged at opposite sides by the stem and tappet when in operation.

2. The combination with a valve actuating stem and a tappet for operatively engaging said stem, of a valve silencer comprlsing a spring seat mounted about the said stem, a, coiled. spring having one end disposed again-st said seat, a pad carried by the opposite end of said spring and held thereby between the stem end and tappet for the purpose set forth.

3. The combination with a valve actuating stem and a itappet for operatively engaging said stem, of a valve silencer comprising a spring seat mounted about the said stem adjacent its end, a coiled spring disposed about the end of the stem with one end resting in said seat, a pad ixed to the opposite end of said spring and pressed there- Macnee by against said tappet to be actuated against said valve stem by actuation of the tappet.

4. vlin an engine-valve of the puppet type having a valve-stem, a spring-cap attached to the valve-stem, and a valve-spring bearing against the cap to hold the valve closed and a rocker arm operating through the valvestem to open the valve, in combination Witha take-up spring which is lighter than the valve-spring and a pad of sound-deadening material held by the take-up spring, the take-up spring being interposed between the rocker arm and the valve-stem with the pad over the end of thevalve-stem.

5. In an engine-valve of the puppet type having a valve-stem, a spring-'cap l'attached to the valve-stem, and a valve-spring bearing against the cap to hold the valve closed and a rocker arm operating through the valve-stem to open the valve, in combination with a ytake-up spring which is lighter than the valve-spring and a pad of sound deadening material with a neck engaged by the take-up spring, the take-up spring and pad being interposed between the rocker arm and valve-stem.

Signed at Seattle, Washington, this 14th day of December, 1'920.

EANUEL i. ADAMS. 

